A.O. Smith TWI 45-190, TWI 35-130 service manual Device types Description, Concentric connections

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3 Installation

 

Explanation of device types

 

 

 

 

 

 

 

Device types

Description

 

 

 

B23

Combustion air is extracted from the installation area.

 

C13

Concentric and/or parallel wall flue terminal

 

C33

Concentric and/or parallel roof flue terminal

 

C43

Devices on common supply and discharge (concentric and/or parallel) in

 

blocks of flats.

 

 

 

C53

Supply and discharge in different pressure area.

 

C63

Devices delivered without flue gas discharge materials and/or terminal. These

 

devices are to be installed in accordance with the applicable local guidelines.

 

 

 

 

 

 

Remark

 

 

 

 

Make sure that the flue gas discharge is positioned in a discharge area in

 

which discharge is allowed for the respective device type.

 

 

 

 

 

3.9.3

Concentric connections

 

 

 

The table gives the requirements that the concentric systems shall meet.

 

 

 

 

 

 

Warning

 

 

 

 

Mount flue gas discharge material with a fall of 5 mm per metre towards

 

the device.

 

 

 

 

 

 

Requirements for flue gas discharge for concentric systems (C13, C33)

 

 

 

 

 

 

Device

Diameter

Maximum length

Maximum num-

 

 

 

 

ber of 90° bends

 

TWI 35-130

80/125

20

5

 

TWI 45-190

80/125

20

5

Caution

Both conditions given in the table shall be complied with.

When using less than the maximum number of bends, it is still not allowed to use more than the maximum pipe length.

When using less than the maximum pipe length, it is still not allowed to use more than the maximum number of bends.

All this will be explained using an example.

Practical example of concentric flue gas discharge

Example

The figure shows a TWI 35-130. The device shall be provided with a 15 m concentric pipe (C13/C33) and four 90° bends. An inspection shall be carried out for compliance of this configuration with the requirements stated in the table.

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Instruction manual TWI 35-130 G/TWI 45-190 G

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Contents 35-130 45-190 Your installer Page Page Copyright 2007 A.O. Smith Water Products Company Page Maintenance InstallationErrors Operation of the deviceTable of content Warranty certificateAbout the device What to do when you smell gas RegulationsIntroduction Introduction Target groupsInstallation Chapter Target groups DescriptionWarranty certificate This chapter contains the terms of warrantyOperation of the device Introduction This chapter will cover in the given orderSecurity of the device Introduction Operation of the deviceHeating cycle Gas control Security of the water temperatureAir pressure switch 4 Fan3 T&P valve Unvented installationVented installation Installation PackagingInstallation Working area Dimensions of the device Dimension Description TWIDimension Description TWI Description Unit TWIVented Circulation piping Cold water sideHot water side Condensation drainageAir supply and flue gas discharge Introduction Requirements for flue gas discharge materialDevice types Device Diameter Maximum length Maximum num Ber of 90 bends Device types DescriptionConcentric connections Practical example of concentric flue gas discharge ExampleSpecifications Subject DescriptionBend Parallel connectionsDevice Diameter Maximum running length Practical example of parallel flue gas discharge ExampleDevice with parallel flue gas discharge material Electrical connection PreparationConnector block Check and adjust the CO2-value Connect the mains voltage Isolating transformerChecking procedure Gas controlAdjust the CO2-value Conversion to another gas category Conversion to another gas category Fill UnventedFill the device Fill unvented installations Fill vented installationsDrain Drain vented InstallationsDrain unvented Opening the gas valve 3.5 Connections diagram Start upStart up For a short time Shut downIntroduction You can Electrically isolateShut down Errors visible on the control ErrorsIntroduction Distinction is made between General errors Explosive ignition Symptom Cause Solution Remark Gas smellWater leakage Symptom Cause Solution Remark Insufficient or no Hot waterTroubleshooting table for errors visible on the control Light pulses Cause Solution RemarkLight pulses Cause Solution Remark SL3 See 12.2 Electrical circuit diagramTWI Maintenance Introduction Prepare maintenanceMaintenance 11.2 Warranty tank Warranty certificate11.1 Warranty general 11.3 Conditions11.7 Obligations Warranty certificate11.6 Claims SmithAnnex Electrical circuit diagram AnnexWiring Annex Index ConnectUser Warranty IndexPage 0308 489 R1.0

TWI 35-130, TWI 45-190 specifications

A.O. Smith TWI 35-130 and TWI 45-190 are high-efficiency water heaters designed to meet the diverse needs of residential and commercial applications. These units are part of A.O. Smith’s extensive product line, known for reliability, durability, and energy efficiency.

The TWI 35-130 model is a 35-gallon tank water heater, offering a first-hour delivery of 130 gallons. This capacity makes it suitable for households with moderate hot water demands. It features a compact design, allowing for easy installation in tighter spaces, which is ideal for urban settings. The unit operates on natural gas, promoting energy efficiency while reducing operational costs.

One of its main attributes is the advanced insulation technology that minimizes heat loss, thus enhancing overall energy efficiency. The TWI 35-130 is equipped with a state-of-the-art burner system that optimizes combustion for higher efficiency, translating to lower energy bills. Furthermore, it utilizes a dip tube that helps in delivering hot water promptly, ensuring that the demand for hot water is met swiftly.

On the other hand, the TWI 45-190 model caters to larger households or commercial settings with a 45-gallon capacity and a first-hour delivery of 190 gallons. This model also uses natural gas, but with a higher BTU rating, allowing for faster recovery rates, which is crucial during peak usage times.

Both models are designed with user-friendliness in mind, featuring intuitive controls that facilitate easy temperature adjustments and monitoring. Additionally, they incorporate safety features such as a temperature and pressure relief valve to prevent overheating and excessive pressure build-up, ensuring peace of mind for users.

Their innovative design also emphasizes longevity, with high-grade materials and protective coatings that resist corrosion and extend the lifespan of the tank. The TWI series stands out in the market not only for its performance and efficiency but also for its commitment to sustainability.

In summary, A.O. Smith's TWI 35-130 and TWI 45-190 water heaters bring together cutting-edge technology, efficiency, and reliability, making them excellent choices for both residential and commercial applications. With features designed to promote energy savings and user convenience, these models are poised to meet the hot water demands of modern life while adhering to high standards of safety and durability.